The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
The smell of freshly cut grass is actually a plant distress call.
31
The storage capacity of human brain exceeds 4 Terrabytes.
140
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
The earth is approx. 6,588,000,000,000,000,000 tons.
175
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
21